Problem: More often than not, regular patterns on the landscape suggest human involvement. For example, the Pattern 1 placemark represents natural vegetation that is being intensively managed by humans. In this case, we are looking at one of the world's largest pecan orchards. The Pattern 2 placemark highlights the concentric rings associated with surface mining. As this mining operation continues, this pattern grows in depth and width. Now zoom to the Pattern 3 placemark to view a pattern that is common across the western U.S. This is a planned suburb where the houses are all very similar in size and appearance. In the scene there are only two buildings that deviate significantly from the pattern. Zoom in and determine what these structures are. The Association 3 placemark is: hint: Turn on the Photos layer in the Primary Database. a combo rail and highway bridge an aqueduct a dam a railway bridge a highway bridge. Need Assignment Help?